Hogwarts: Chill, I'm Not That Riddle - Chapter 8: Learning Efficiency

Everything was going on well until the night before her wedding, Lin Shuyin’s fairytale life suddenly crumbled from her fiancé's call, dragging her to reality...Her fiancé abandons her for her stepsister, her father and stepmother escape, abandoning her to fend off the reporters and media, and by morning, she’s framed for her grandmother’s murder. Thrown into a cruel underground prison, she dies beaten and broken.But death is only the beginning.An ancient soul awakens within her, a woman who spent a century trapped in a lab, experimented on, and injected with beast blood. When her soul awakens, the weak and naive Shuyin is gone. In her place rises someone colder, sharper… unstoppable.Then comes Lu Yuze, her ex-fiancé’s uncle, a man wrapped in secrets and power. He saves her from the abyss, but not for free. His price? Her blood, and her bone marrow… to save his dying daughter. The only thing Lu Shuyin wanted was revenge, and asked for a contract marriage, and money, these were the most important things to survive out there...In a world where betrayal runs deep, love becomes the most dangerous experiment of all.She’s no longer the victim.She’s the revenge they never saw coming.

Liu Duo was a young girl whose grandmother sold her to four brothers with the intent to be a bride. Unwilling, she ran away the following night, only to fall unconscious while trying to get away. Unexpectedly, however, she was reborn with the spirit of a 25 year old woman, also named Liu Duo.

- Description from Novelupdates

Bad End Night is a novel by Hitoshizuku-P, based on a series of Vocaloid songs, the NighT Series. The plot revolves around eight actors trapped in a never-ending play, seeking a way to escape.

Bob was a good guy. He had done everything you were supposed to do. He exercised, he kept to a healthy diet, he'd studied hard, gotten excellent grades, and was working towards his masters. Somehow, things just weren't working out for him like he'd been told they would. He was stuck in a thankless position, constantly passed over, and it seemed that the only being on earth that cared about him was his cat.

Then things got worse.

Never back a man into a corner unless you want to find out just how hard he can fight.